GETTA Help

Shower keeps going hot and cold

Fluctuating shower temperature may result from changing flow, a thermostatic valve, boiler performance or competing water use.

Likely causes

  • Restricted shower heads, pressure changes, worn mixer cartridges and hot-water appliance faults are possibilities.

Safe checks you can make

  • Check whether other taps fluctuate and whether the problem occurs when another outlet runs.
  • Clean only removable shower-head parts according to their instructions.

When to stop and get urgent help

  • Stop using a shower that suddenly becomes scalding or cannot regulate temperature.

How a plumber can help

  • A plumber can assess the mixer and water system; a Gas Safe engineer is required for work inside a gas boiler.